Slidable conveyance assembly

ABSTRACT

A device for a slidable assembly may include a support channel, defined by first, second, and third support sides and including a primary support bearing and a tertiary support bearing, and a slide channel, defined by first, second, and third slide sides and including a primary slide bearing and a tertiary slide bearing. In an assembled state, the slide channel may fit around the support channel such that the primary support bearing contacts the first slide side and the primary slide bearing contacts the first support side such that the first slide channel is configured to slide longitudinally with respect to the first support channel, and the tertiary support bearing contacts the first slide channel and the tertiary slide bearing contacts the first support channel to restrict lateral transition of the first slide channel with respect to the first support channel.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. application Ser. No.14/530,452, filed on Oct. 31, 2014. The entire contents of which areincorporated by reference in the present disclosure.

FIELD

The embodiments discussed herein are related to slidable conveyanceassemblies.

BACKGROUND

The installation of a slidable or extendible cargo deck conveyanceassembly to the cargo beds of vehicles such as pickup trucks has beencommon practice to facilitate the loading and unloading of freightarticles on and off the bed of the vehicles. A typical conveyanceassembly includes a cargo deck, configured to fit within a cargo bed,which slidably engages with a sliding or rolling mechanism that may befixedly or slidably coupled to the cargo bed. The cargo deck is adaptedto transition in a longitudinal direction relative to the cargo bed,such that the deck may be extended from or retracted into the cargo bed.When extended from the cargo bed, fuller access is provided to the cargodeck from multiple sides, a marked improvement over the limited accessto the cargo bed provided by most vehicles.

The subject matter claimed herein is not limited to embodiments thatsolve any disadvantages or that operate only in environments such asthose described above. Rather, this background is only provided toillustrate one exemplary technology area where some embodimentsdescribed herein may be practiced.

SUMMARY

An example embodiment may include a first support channel, defined by afirst support side, a second support side, and a third support side, andincluding a first primary support bearing and a first tertiary supportbearing. The embodiment may further include a first slide channel,defined by a first slide side, a second slide side, and a third slideside, and including a first primary slide bearing and a first tertiaryslide bearing. In an assembled state, the first slide channel may fitaround the first support channel such that the first primary supportbearing contacts the first slide side and the first primary slidebearing contacts the first support side such that the first slidechannel is configured to slide longitudinally with respect to the firstsupport channel, and the first tertiary support bearing contacts thefirst slide channel and the first tertiary slide bearing contacts thefirst support channel to restrict lateral transition of the first slidechannel with respect to the first support channel.

Another example embodiment may include a support frame having a firstsupport channel, defined by a first support side, a second support side,and a third support side, and including a first primary support bearingand a first tertiary support bearing, a second support channel, definedby a fourth support side, a fifth support side, a sixth support side,and including a second primary support bearing and a second tertiarysupport bearing, and a first support cross-member. The embodiment mayfurther include a slide frame having a first slide channel, defined by afirst slide side, a second slide side, and a third slide side, andincluding a first primary slide bearing and a first tertiary slidebearing, a second slide channel, defined by a fourth slide side, a fifthslide side, and a sixth slide side, and including a second primary slidebearing and a second secondary slide bearing, and a first slidecross-member.

In an assembled state, the first slide channel may fit around the firstsupport channel such that the first primary support bearing contacts thefirst slide side and the first primary slide bearing contacts the firstsupport side such that the first slide channel is configured to slidelongitudinally with respect to the first support channel, and the firsttertiary support bearing contacts the first slide channel and the firsttertiary slide bearing contacts the first support channel to restrictlateral transition of the first slide channel with respect to the firstsupport channel. In the assembled state, the second slide channel mayalso fit around the second support channel such that the second primarysupport bearing contacts the fourth slide side and the second primaryslide bearing contacts the fourth support side such that the secondslide channel is configured to slide longitudinally with respect to thesecond support channel, and the second tertiary support bearing contactsthe second slide channel and the second tertiary slide bearing contactsthe second support channel to restrict lateral transition of the secondslide channel with respect to the second support channel. The slideframe may slide along the support frame such that the first and secondslide channels slide in unison.

This Summary is provided to introduce a selection of concepts in asimplified form that are further described below in the DetailedDescription. This Summary is not intended to identify key features oressential characteristics of the claimed subject matter, nor is itintended to be used as an aid in determining the scope of the claimedsubject matter.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary and explanatory and arenot restrictive of the invention, as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

Example embodiments will be described and explained with additionalspecificity and detail through the use of the accompanying drawings inwhich:

FIG. 1A illustrates a top view of an example support channel;

FIG. 1B illustrates a side view of the support channel of FIG. 1A;

FIG. 1C illustrates a cross-sectional view of the support channel ofFIG. 1A;

FIG. 2A illustrates a top view of an example slide channel;

FIG. 2B illustrates a side view of the slide channel of FIG. 2A;

FIG. 2C illustrates a cross-sectional view of the slide channel of FIG.2A;

FIG. 3A illustrates a cross-sectional view of the support channel ofFIG. 1A and the slide channel of FIG. 2A in an assembled state;

FIG. 3B illustrates a cross-sectional view of the support channel ofFIG. 1A and the slide channel of FIG. 2A in an assembled state;

FIG. 4 illustrates a top view of an example support frame;

FIG. 5 illustrates a bottom view of an example slide frame;

FIG. 6A illustrates a perspective view of an example slidable conveyanceassembly in a partially extended state;

FIG. 6B illustrates a top view of the assembly of FIG. 6A in anunextended state;

FIG. 6C illustrates a top view of the assembly of FIG. 6A in a fullyextended state; and

FIG. 6D illustrates a bottom view of the assembly of FIG. 6A in a fullyextended state.

DETAILED DESCRIPTION OF EMBODIMENTS

In the following detailed description, reference is made to theaccompanying drawings, which form a part hereof. In the drawings,similar symbols typically identify similar components, unless contextdictates otherwise. The illustrative embodiments described in thedetailed description, drawings, and claims are not meant to be limiting.Other embodiments may be utilized, and other changes may be made,without departing from the spirit or scope of the subject matterpresented herein. The aspects of the present disclosure, as generallydescribed herein, and illustrated in the Figures, can be arranged,substituted, combined, separated, and designed in a wide variety ofdifferent configurations, all of which are explicitly contemplatedherein.

Some embodiments herein are directed to conveyance assemblies that mayinclude a slide channel and a support channel. Each of the slide andsupport channels may include primary and tertiary support bearings. Theprimary bearings may be configured to support lateral movement of theslide channel with respect to the support channel. The tertiary supportbearings may be configured to provide lateral support between the slidechannel and the support channel.

Sliding or rolling mechanisms in some previous conveyance assemblies didnot include lateral support to help to reduce and/or prevent a cargodeck coupled to the rolling mechanism from tilting in a lateraldirection relative to the structure that housed the conveyanceassemblies. In these and other assemblies, the sliding or rollingmechanisms may be coupled by permanently welding cross-members to securethe desired orientation of the sliding or rolling mechanisms in aninstalled state. In contrast, in some embodiments of the conveyanceassemblies described herein, the tertiary support bearings may providesufficient lateral support such that cross-members may be eliminated orfixed through a fastener (e.g., not welded) such that a footprint of theconveyance assemblies when disassembled may be smaller than otherprevious conveyance assemblies. A smaller footprint for a conveyanceassembly may reduce storage, shipping, installment, manufacturing, andother costs, along with providing other benefits.

FIGS. 1A-1C illustrate top, side, and cross-sectional views of anexample support channel 10, arranged in accordance with at least oneembodiment described herein.

The support channel 10 may be defined by first, second, and third sides11, 12, 13. The second and third sides 12, 13 may extend orthogonallyfrom the first side 11, such that the support channel 10 may besubstantially rectangular. A first flange 14 a may extend from thesecond side 12, away from the third side 13. A second flange 14 b mayextend from the third side 13, away from the second side 12.

The support channel 10 may include first, second, and third fastenertabs 18 a, 18 b, and 18 c, referred to herein as “fastener tabs 18,”coupled to the first side 11. The fastener tabs 18 may be configured toreceive fasteners to couple the fastener tabs 18 with supportcross-members to facilitate the assembly of a support frame, describedin further detail below.

The support channel 10 may include a primary support bearing 15 operablycoupled to the second and third sides 12, 13 of the support channel 10.The support channel 10 may include a tertiary support bearing 17operably coupled to the third fastener tab 18 c. The tertiary supportbearing 17 may extend through openings 11 o, 12 o defined, respectively,along the first side 11 and the second side 12. The primary and tertiarysupport bearings 15, 17 may be configured to contact, respectively, afirst side 21 and a first flange 24 a of a slide channel 20 (FIGS.2A-2C), described in further detail below.

The support channel 10 may also include a catch member 19 configured toengage with a stop member 29 of the slide channel 20 (FIGS. 2A-2C) tohelp to reduce and/or prevent overextension of the slide channel 20 withrespect to the support channel 10, described in further detail below.

The support channel 10 may be formed from any type or a combination oftypes of materials. In some embodiments, the support channel 10 may beformed from steel. In particular, the support channel 10 may be formedby roll-forming steel.

FIGS. 2A-2C illustrate bottom, side, and cross-sectional views of theslide channel 20, arranged in accordance with at least one embodimentdescribed herein.

The slide channel 20 may include a first side 21, a second side 22, anda third side 23. The second and third sides 22, 23 may extendorthogonally from the first side 21, such that the slide channel 20 maybe substantially rectangular. A first flange 24 a may extend from thesecond side 22 toward the third side 23. A second flange 24 b may extendfrom the third side 23 toward the second side 22.

The slide channel 20 may include a primary slide bearing 25 operablycoupled to the first side 21 of the slide channel 20. The slide channel20 may include first and second secondary slide bearings 26 a, 26 b,referred to herein as “secondary slide bearings 26,” operably coupled tothe second and third sides 22, 23, respectively, of the slide channel20. The slide channel 20 may also include a tertiary slide bearing 27operably coupled to the third side 23 of the slide channel 20. Theprimary slide bearing 25 may be configured to contact the first side 11of the support channel 10. The secondary slide bearings 26 may beconfigured to contact the first and second flanges 14 a, 14 b of thesupport channel 10. The tertiary slide bearing 27 may be configured tocontact the third side 13 of the support channel 10.

The slide channel 20 may further include a stop member 29, disposedalong the first side 21. The stop member 29 may be configured to contactthe catch member 19 of the support channel 10 to help to reduce and/orprevent overextension of the slide channel 20 with respect to thesupport channel 10, described in further detail below.

The slide channel 20 may be formed from any type or a combination oftypes of materials. In some embodiments, the slide channel 20 may beformed from steel. In particular, the slide channel 20 may be formed byroll-forming steel.

FIGS. 3A and 3B illustrate cross-sectional views of the support channel10 of FIGS. 1A-1C and the slide channel 20 of FIGS. 2A-2C in anassembled state, arranged in accordance with at least one embodimentdescribed herein. More particularly, FIG. 3A illustrates theinteractions of the primary and tertiary support bearings 15, 17 withthe slide channel 20. FIG. 3B illustrates the interactions of theprimary, secondary, and tertiary slide bearings 25, 26, 27 with thesupport channel 10. In the assembled state, the primary and tertiarysupport bearing 15, 17 and the primary, secondary, and tertiary slidebearings 25, 26, 27 may be located at opposite ends of, respectively,the support and slide channels 10, 20. Accordingly, the cross-sectionalviews of FIGS. 3A and 3B may illustrate opposite ends of the support andslide channels 10, 20 in the assembled state.

In the assembled state, the support channel 10 may be at least partiallyenclosed by the slide channel 20, the respective second sides 12, 22,and the third sides 13, 23 of the support and slide channels 10, 20 maybe adjacent to one another, and the first and second flanges 24 a, 24 bof the slide channel 20 may overlap with the first and second flanges 14a, 14 b of the support channel 10. The first and second flanges 14 a, 14b of the support channel 10 may extend orthogonally to define a widthequal to approximately the length of the first side 21 of the slidechannel 20. The first and second flanges 24 a, 24 b of the slide channel20 may extend orthogonally to define a space equal to approximately thelength of the first side 11 of the support channel 10. Accordingly,longitudinal movement of the slide channel 20 with respect to thesupport channel 10 may be substantially restricted by the respectiveflanges 14 a, 14 b, 24 a, 24 b.

Referencing FIG. 3A, the primary support bearing 15 may contact thefirst side 21 of the slide channel 20 to facilitate longitudinalmovement of the slide channel 20 with respect to the support channel 10.The tertiary support bearing 17 may contact the first flange 24 a of theslide channel 20 to help to reduce and/or prevent lateral movement ofthe slide channel 20 with respect to the support channel 10.

Referencing FIG. 3B, the primary slide bearing 25 may contact the firstside 11 of the support channel 10 to facilitate longitudinal movement ofthe slide channel 20 with respect to the support channel 10. Thesecondary slide bearings 26 may contact the first and second flanges 14a, 14 b of the support channel 10 to further facilitate longitudinalmovement of the slide channel 20 with respect to the support channel 10and to help to reduce and/or prevent accidental or other disassembly ofthe slide channel 20 from the support channel 10. The tertiary slidebearing 27 may contact the third side 13 of the support channel 10 tohelp to reduce and/or prevent lateral movement of the slide channel 20with respect to the support channel 10.

In the example embodiment, the roll-formed manufacture of the supportand slide channels 10, 20 may allow for smoother longitudinal transitionof the slide channel 20 with respect to the support channel 10. Forexample, the roll-formed manufacture may reduce or eliminate mil thatmay form in the slide channel 20 when the slide channel 20 ismanufactured using other methods. The substantially rectangular shapesof the support and slide channels 10, 20 may facilitate smooth contactbetween the support and slide bearings 15, 17, 25, 26, 27 and thesupport and slide channels 10, 20, further promoting smooth translationof the slide channel 20 with respect to the support channel 10 andthereby reducing wear on the support or slide bearings 15, 17, 25, 26,27. Alternately or additionally, the stop member 29 may contact thecatch member 19 as the slide channel 20 slides along the support channel10 to help to reduce and/or prevent overextension and/or accidentaldisassembly.

Modifications, additions, or omissions may be made to the supportchannel 10 illustrated in FIGS. 1A-1C and the slide channel 20illustrated in FIGS. 2A-2C without departing from the scope of thepresent disclosure. The proportions and dimensions of the supportchannel 10 and/or slide channel 20 may vary. Accordingly, the dimensionsor locations of the support or slide bearings 15, 17, 25, 26, 27 mayvary. Furthermore, the number of support or slide bearings 15, 17, 25,26, 27 provided on the support and slide channels 10, 20 may vary. Inthese and other embodiments, the catch and stop members 19, 29 may beremovable to allow disassembly of the slide channel 20 from the supportchannel 10.

FIG. 4 illustrates a top view of an example support frame 200, arrangedin accordance with at least one embodiment described herein. The supportframe 200 may include first and second support channels 110 a and 110 b,referred to herein as “support channel(s) 110.” The support channels 110may substantially embody the support channel 10 described according toFIGS. 1A-1C. The support frame 200 may further include first, second,and third support cross-members 130 a, 130 b, 130 c, referred to hereinas “support cross-member(s) 130.” The first support cross-member 130 amay be coupled to the first and second support channels 110 a, 110 b atthe respective first fastener tabs 18 a. The second support cross-member130 b may be coupled to the respective second fastener tabs 18 b of thefirst and second support channels 110 a, 110 b. The third supportcross-member 130 c may be coupled to the first and second supportchannels 110 a, 110 b at the respective third fastener tabs 18 c. Thesupport cross-members 130 may be configured to receive fasteners tofacilitate fixation of the support frame 200 to a structure, such as acargo space inside of a vehicle or other storage space. In otherembodiments, the support cross-members 130 may couple to the supportchannels 110 using other fastener devices. In these and otherembodiments, the support cross-members 130 may not be welded to thesupport channels 110.

FIG. 5 illustrates a bottom view of an example slide frame 300, arrangedin accordance with at least one embodiment described herein. The slideframe 300 may include first and second slide channels 120 a and 120 b,referred to herein as “slide channel(s) 120.” The slide channels 120 maysubstantially embody the slide channel 20 described according to FIGS.2A-2C. Each of the first and second slide channels 120 a, 120 b mayinclude first, second, and third fastener tabs 28 a, 28 b, 28 c,referred to herein as “fastener tab(s) 28,” coupled to the second orthird side 22, 23. The slide frame 300 may further include first,second, third, and fourth slide cross-members 140 a, 140 b, 140 c, 140 dreferred to herein as “slide cross-member(s) 140.” The first slidecross-member 140 a may be coupled to the first and second slide channels120 a, 120 b at the respective first fastener tabs 28 a. The secondslide cross-member 140 b may be coupled to the first and second slidechannels 120 a, 120 b at the respective second fastener tabs 28 b. Thethird slide cross-member 140 c may be coupled to the first and secondslide channels 120 a, 120 b at the respective third fastener tabs 28 c.The fourth slide cross-member 140 d may be coupled to the first andsecond slide channels 120 a, 120 b at the respective proximal ends. Theslide cross-members 140 may be configured to receive fasteners tofacilitate fixation of an apparatus, such as a container, drawer, orshelf, to the slide frame 300. In other embodiments, the slidecross-members 140 may couple to the slide channels 120 using otherfastener devices. In these and other embodiments, the slidecross-members 140 may not be welded to the slide channels 120. The slideframe 300 may be configured to support a latch mechanism, described infurther detail below.

As illustrated in FIGS. 6A-6D, the slide frame 300 may slidably engagewith the support frame 200 to form a slidable conveyance assembly 100(referred to herein as the “assembly 100”). The support frame 200 may beconfigured to be fixed to a structure, such as a cargo space inside of avehicle or other storage space. The slide frame 300 may be configured toslide with respect to the support frame 200 in a longitudinal directionrelative to the cargo space. Furthermore, the slide frame 300 may beconfigured to support any apparatus, such as a container, drawer, and/ora shelf. The apparatus supported thereon may therefore be transitionedin and out of the structure by transitioning the slide frame 300.

The slide channels 120 of the slide frame 300 may be slidably engagedwith the support channels 110 of the support frame 200 in an assembledstate that substantially embodies the slidable engagement of theassembled state of the slide channel 20 with the support channel 10described according to FIGS. 3A and 3B. Accordingly, the slide channels120 may slide with respect to the support channels 110 by way of theprimary and tertiary support bearings against the slide channels 120 andthe primary, secondary, and tertiary slide bearings against the supportchannels 110. The first slide channel 120 a may slide with respect tothe first support channel 110 a and the second slide channel 120 b mayslide with respect to the second support channel 110 b. As a result, theslide frame 300 may slidably transition in a longitudinal directionalong the support frame 200 between an unextended state (FIGS. 6A and6B) and an extended state (FIGS. 6C and 6D), with little to no lateralmovement relative to the support frame 200.

The assembly 100 may further include a latch mechanism 150. The latchmechanism 150 may include a first latch member 151 having first, second,and third corners 151 a, 151 b, 151 c, a second latch member 152 havingfirst and second ends 152 a, 152 b, a latch rod 153 having first andsecond ends 153 a, 153 b, and a latch handle 154 at the first end 153 aof the latch rod 153. The first corner 151 a may be rotatably engagedwith a first tab 155 a disposed on the first slide cross-member 140 a.The second corner 151 b may be rotatably engaged with a second tab 155 bdisposed on the second end 153 b of the latch rod 153. The third corner151 c may be rotatably engaged with the first end 152 a of the secondlatch member 152. The latch rod 153 may be manipulated by the latchhandle 154 to transition the latch mechanism 150 between an engagedstate and an unengaged state. In the engaged state, the second latchmember 152 may transition laterally towards the first slide channel 120a; in the unengaged state, the second latch member 152 may transitionlaterally away from the first slide channel 120 a.

The latch mechanism 150 may be configured to secure the slide frame 300with respect to the support frame 200 such that slidable movement of theslide frame 300 with respect to the support frame 200 is restricted atcertain points. In some embodiments, the first slide channel 120 a mayinclude a first slot configured to receive the second end 152 b of thesecond latch member 152. The first support channel 110 a may include oneor more slots configured to align with the first slot of the first slidechannel 120 a as the slide frame 300 slides with respect to the supportframe 200. Accordingly, at certain points along the slidable transitionof the slide frame 300, the first slot of the first slide channel 120 amay align with one of the one or more slots of the first support channel110 a, whereupon the latch mechanism 150 may be transitioned into theengaged state, such that the second latch member 152 extends through theslots of both the first support and slide channels 110 a, 120 a, therebysecuring the slide frame 300 with respect to the support frame 200.

Modifications, additions, or omissions may be made to the assembly 100illustrated in FIGS. 4-6D without departing from the scope of thepresent disclosure. In some embodiments, the support and slide frames200, 300 may include fewer or more support and slide cross-members 130,140, respectively, than those illustrated. Alternately or additionally,the support and slide cross-members 130, 140 may be disposed along thesupport and slide channels 110, 120 at different locations than thoseillustrated. In other embodiments, the assembly 100 may not include anysupport or slide cross-members 130, 140. In these and other embodiments,an apparatus supported by the assembly 100, such as a drawer or shelf,may be coupled to both first and second slide channels 120 a, 120 b ofthe slide frame 300 such that the first and second slide channels 120 a,120 b slide along the first and second support channels 110 a, 110 b inunison. Alternately or additionally, in some embodiments, the assembly100 may not include the latch mechanism 150, or may include more thanone latch mechanism 150, or may include a different type of latchmechanism 150 than that discussed and/or illustrated above.

Alternately or additionally, the assembly 100 may include fewer or moresupport and slide channels 110, 120. For example, in some embodiments,the assembly 100 may include a single support channel 110 and a singleslide channel 120. Alternately or additionally, the assembly 100 mayinclude three or more support channels 110 and a corresponding slidechannel 120 for each support channel 110 provided. In these and otherembodiments, the number of support and slide channels 110, 120 providedmay vary based on the required width of the assembly 100, the apparatussupported by the assembly 100, and/or the weight of the cargo to besupported by the assembly 100, among other factors.

From the foregoing, it will be appreciated that various embodiments ofthe present disclosure have been described herein for purposes ofillustration, and that various modifications may be made withoutdeparting from the scope and spirit of the present disclosure.Accordingly, the various embodiments disclosed herein are not intendedto be limiting, with the true scope and spirit being indicated by thefollowing claims.

What is claimed is:
 1. A device, comprising: a first support channel, defined by a first support side, a second support side, and a third support side, and including a first primary support bearing and a first tertiary support bearing; and a first slide channel, defined by a first slide side, a second slide side, and a third slide side, and including a first primary slide bearing and a first tertiary slide bearing, wherein, in an assembled state, the first slide channel fits around the first support channel such that: the first primary support bearing contacts the first slide side and the first primary slide bearing contacts the first support side such that the first slide channel is configured to slide longitudinally with respect to the first support channel; and the first tertiary support bearing contacts the first slide channel and the first tertiary slide bearing contacts the first support channel to restrict lateral transition of the first slide channel with respect to the first support channel.
 2. The device of claim 1, wherein: the first support channel further comprises a first support flange disposed along the second support side and a second support flange disposed along the third support side; the first slide channel further comprises first and second secondary slide bearings; and the first and second secondary slide bearings contact, respectively, the first and second support flanges such that the first slide channel is configured to slide longitudinally with respect to the first support channel.
 3. The device of claim 1, wherein: the first slide channel further comprises a first slide flange disposed along the second slide side and a second slide flange disposed along the third slide side; and the first tertiary support bearing contacts the first slide flange.
 4. The device of claim 1, wherein the first tertiary support bearing is oriented orthogonally to the first primary support bearing.
 5. The device of claim 1, wherein the first tertiary slide bearing is oriented orthogonally to the first primary slide bearing.
 6. The device of claim 1, wherein: the first support channel further comprises a fastener tab; and the first tertiary support bearing is operably coupled to the fastener tab.
 7. The device of claim 1, wherein: the first support channel further comprises a catch member disposed along the first support side; the first slide channel further comprises a stop member disposed along the first slide side; and in the assembled state, the stop member contacts the catch member as the first slide channel slides along the first support channel.
 8. The device of claim 1, further comprising: a second support channel, defined by a fourth support side, a fifth support side, a sixth support side, and including a second primary support bearing and a second tertiary support bearing; a second slide channel, defined by a fourth slide side, a fifth slide side, and a sixth slide side, and including a second primary slide bearing and a second tertiary slide bearing, wherein, in an assembled state, the second slide channel fits around the second support channel such that: the second primary support bearing contacts the fourth slide side and the second primary slide bearing contacts the fourth support side such that the second slide channel is configured to slide longitudinally with respect to the second support channel; and the second tertiary support bearing contacts the second slide channel and the second tertiary slide bearing contacts the second support channel to restrict lateral transition of the second slide channel with respect to the second support channel.
 9. The device of claim 8, wherein: the second support channel further comprises a third support flange disposed along the fifth support side and a fourth support flange disposed along the sixth support side; the second slide channel further comprises third and fourth secondary slide bearings; and the third and fourth secondary slide bearings contact, respectively, the third and fourth support flanges such that the second slide channel is configured to slide longitudinally with respect to the second support channel.
 10. The device of claim 8, wherein: the second slide channel further comprises a third slide flange disposed along the fifth slide side and a fourth slide flange disposed along the sixth slide side; and the second tertiary support bearing contacts the third slide flange.
 11. The device of claim 8, wherein the second tertiary support bearing is oriented orthogonally to the second primary support bearing.
 12. The device of claim 8, wherein the second tertiary slide bearing is oriented orthogonally to the second primary slide bearing. 